In a brinell hardness test, a 1500-kg load is pressed into a specimen using a 10-mm-diameter hardened steel ball. the resulting indentation has a diameter = 3.2 mm. (a) determine the brinell hardness number for the metal. (b) if the specimen is steel, estimate the tensile strength of the steel.

During spring semester at mit, residents of the parallel buildings of the east campus dorms battle one another with large catapults that are made with surgical hose mounted on a window frame. a balloon filled with dyed water is placed in a pouch attached to the hose, which is then stretched through the width of the room. assume that the stretching of the hose obeys hooke's law with a spring constant of 89.0 n/m. if the hose is stretched by 5.80 m and then released, how much work does the force from the hose do on the balloon in the pouch by the time the hose reaches its relaxed length? unitst 3 number-1497 the tolerance is +/-5% open show work click if you would like to show work for this question:

Lymphocytes known as blastocysts make antibodies that fight infection. select the best answer from the choices provided t f

What is friction? how does it affect the motion of an object?